EP1202460A4 - Logarithmic a/d converter, method of logarithmic a/d conversion, logarithmic d/a converter, method of logarithmic d/a conversion, and system for measuring physical quantity - Google Patents

Logarithmic a/d converter, method of logarithmic a/d conversion, logarithmic d/a converter, method of logarithmic d/a conversion, and system for measuring physical quantity

Info

Publication number
EP1202460A4
EP1202460A4 EP01902852A EP01902852A EP1202460A4 EP 1202460 A4 EP1202460 A4 EP 1202460A4 EP 01902852 A EP01902852 A EP 01902852A EP 01902852 A EP01902852 A EP 01902852A EP 1202460 A4 EP1202460 A4 EP 1202460A4
Authority
EP
European Patent Office
Prior art keywords
logarithmic
converter
conversion
produced
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01902852A
Other languages
German (de)
French (fr)
Other versions
EP1202460B1 (en
EP1202460A1 (en
Inventor
Masami Yakabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Electron Ltd
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Publication of EP1202460A1 publication Critical patent/EP1202460A1/en
Publication of EP1202460A4 publication Critical patent/EP1202460A4/en
Application granted granted Critical
Publication of EP1202460B1 publication Critical patent/EP1202460B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H03M1/664—Non-linear conversion not otherwise provided for in subgroups of H03M1/66
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/34—Analogue value compared with reference values
    • H03M1/36—Analogue value compared with reference values simultaneously only, i.e. parallel type
    • H03M1/367—Non-linear conversion

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Measurement Of Radiation (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

An analog multiplier 11 raises a base reference voltage "Vref0" to the nth power so that a reference voltage "Vref1" is produced. Analog multipliers 12 and 13 sequentially raise the reference voltage "Vref1" to the nth power so that reference voltages "Vref2" and "Vref3" are produced. Switch groups 38-41 control the reference voltages "Vref0" to "Vref3", which are then sent to an analog multiplier 14 together with an input voltage "Vin". A comparator 14 sequentially compares a multiplication result "Vx" of the multiplier 14 with a voltage "Vout" outputted from a sensor circuit 2, so that a digital output value "Dout" is produced. The analog multiplier 14 is set as appropriate. <IMAGE>
EP01902852A 2000-02-14 2001-02-13 Logarithmic a/d converter, method of logarithmic a/d conversion, logarithmic d/a converter, method of logarithmic d/a conversion, and system for measuring physical quantity Expired - Lifetime EP1202460B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2000034874 2000-02-14
JP2000034874 2000-02-14
PCT/JP2001/000998 WO2001059933A1 (en) 2000-02-14 2001-02-13 Logarithmic a/d converter, method of logarithmic a/d conversion, logarithmic d/a converter, method of logarithmic d/a conversion, and system for measuring physical quantity

Publications (3)

Publication Number Publication Date
EP1202460A1 EP1202460A1 (en) 2002-05-02
EP1202460A4 true EP1202460A4 (en) 2004-04-21
EP1202460B1 EP1202460B1 (en) 2006-04-19

Family

ID=18559143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01902852A Expired - Lifetime EP1202460B1 (en) 2000-02-14 2001-02-13 Logarithmic a/d converter, method of logarithmic a/d conversion, logarithmic d/a converter, method of logarithmic d/a conversion, and system for measuring physical quantity

Country Status (9)

Country Link
US (2) US6633247B2 (en)
EP (1) EP1202460B1 (en)
KR (1) KR100525534B1 (en)
CN (1) CN1179485C (en)
AT (1) ATE323970T1 (en)
DE (1) DE60118861T2 (en)
DK (1) DK1202460T3 (en)
TW (1) TW525353B (en)
WO (1) WO2001059933A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW525353B (en) * 2000-02-14 2003-03-21 Sumitomo Metal Ind Logarithmic-type A/D converter, logarithmic-type A/D converting method, logarithmic-type D/A converter, logarithmic-type D/A converting method, and physical value measuring system
WO2006080364A1 (en) * 2005-01-25 2006-08-03 Rohm Co., Ltd Power supply device, electronic device, and a/d converter used for them
CN100592634C (en) * 2005-06-23 2010-02-24 中国科学院电子学研究所 Signal amplitude section divided charge redistribution successive approximation A/D converter
US7583211B1 (en) * 2008-02-08 2009-09-01 Zerog Wireless, Inc. Analog-to-digital conversion circuit
CN101441230B (en) * 2008-12-18 2012-05-30 华为技术有限公司 Method and apparatus for implementing voltage detection
TWI396372B (en) * 2009-10-02 2013-05-11 Himax Tech Ltd Booster and voltage detection method thereof
KR102170658B1 (en) 2014-04-21 2020-10-27 삼성전자주식회사 Successive approximation analog-to-digital converter and method for analog-to-digital converting thereof
CN104035746B (en) * 2014-06-06 2017-02-15 中国科学院长春光学精密机械与物理研究所 Simple logarithmic change voltage generation circuit
DE102014226136B3 (en) * 2014-12-16 2016-02-11 Dialog Semiconductor (UK) Ltd measuring circuit
US9917593B2 (en) * 2015-12-16 2018-03-13 Intrinsix Corp. Logarithmic analog to digital converter devices and methods thereof
CN105677295B (en) * 2016-01-04 2018-06-26 湖南工业大学 Seek the circuit of ratio value between two input voltages
DE102017106896B4 (en) 2017-03-30 2023-02-02 Infineon Technologies Ag Electronic switch for electronic fuse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251052A (en) * 1963-05-15 1966-05-10 Towson Lab Inc Reversible analog to digital converter
US4142185A (en) * 1977-09-23 1979-02-27 Analogic Corporation Logarithmic analog-to-digital converter

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US3573448A (en) * 1969-07-25 1971-04-06 Ibm Hybrid multiplier
US3646548A (en) * 1971-01-15 1972-02-29 Raytheon Co Nonlinear analog-to-digital converter
US4106010A (en) 1976-05-05 1978-08-08 Texaco Inc. Logarithmic analog-to-digital converter
JPS5457855A (en) 1977-09-23 1979-05-10 Analogic Corp Logarithmic ad converter
JPS5857132A (en) 1981-09-30 1983-04-05 Ricoh Co Ltd Electrostatic recording material
JPS5857132U (en) * 1981-10-14 1983-04-18 ソニー株式会社 Analog to digital converter for audio signals
JPS59231456A (en) 1983-06-15 1984-12-26 Nippon Telegr & Teleph Corp <Ntt> Level detecting apparatus
JPS6170439A (en) 1984-09-13 1986-04-11 Sumitomo Metal Ind Ltd Measuring device of crack
JPS6170439U (en) * 1984-10-16 1986-05-14
JPH01158878A (en) 1987-12-15 1989-06-21 Canon Inc Picture reader
JPH0250523A (en) 1988-08-12 1990-02-20 Hitachi Ltd A/d converting circuit
US5699004A (en) * 1996-05-01 1997-12-16 Hewlett-Packard Company Temperature compensation of logarithmic amplifiers in a sampled data system
US6002122A (en) * 1998-01-23 1999-12-14 Transient Dynamics High-speed logarithmic photo-detector
US6208278B1 (en) * 1999-05-07 2001-03-27 Infineon Technologies North America Corp. System and method for logarithmic digital to analog conversion
TW525353B (en) * 2000-02-14 2003-03-21 Sumitomo Metal Ind Logarithmic-type A/D converter, logarithmic-type A/D converting method, logarithmic-type D/A converter, logarithmic-type D/A converting method, and physical value measuring system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251052A (en) * 1963-05-15 1966-05-10 Towson Lab Inc Reversible analog to digital converter
US4142185A (en) * 1977-09-23 1979-02-27 Analogic Corporation Logarithmic analog-to-digital converter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CANTARANO S ET AL: "LOGARITHMIC ANALOG-TO-DIGITAL CONVERTERS: A SURVEY", IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, IEEE INC. NEW YORK, US, vol. IM-22, no. 3, 1 September 1973 (1973-09-01), pages 201 - 213, XP000676103, ISSN: 0018-9456 *

Also Published As

Publication number Publication date
US6900751B2 (en) 2005-05-31
ATE323970T1 (en) 2006-05-15
EP1202460B1 (en) 2006-04-19
EP1202460A1 (en) 2002-05-02
US6633247B2 (en) 2003-10-14
DE60118861T2 (en) 2006-11-16
CN1179485C (en) 2004-12-08
WO2001059933A1 (en) 2001-08-16
KR100525534B1 (en) 2005-11-02
US20040263371A1 (en) 2004-12-30
US20020181257A1 (en) 2002-12-05
KR20010113798A (en) 2001-12-28
CN1363141A (en) 2002-08-07
DE60118861D1 (en) 2006-05-24
TW525353B (en) 2003-03-21
DK1202460T3 (en) 2006-08-14

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